| Abstract | Smart elderly care system, which integrates IoT technologies into traditional healthcare system, has recently received considerable attention, as it can significantly alleviate pension and medical problems in an aging society. As the first shield to address security issues in the IoT environment, authentication, especially mutual authentication, has played a critical role. However, none of the existing authentication schemes can simultaneously achieve fault tolerance, privacy preservation, and efficiency. In this paper, we propose a lightweight mutual authentication scheme that can simultaneously support the aforementioned three properties. In particular, we integrate the novel XOR filter and Hamming distance to make fault tolerance and privacy preservation possible. By employing efficient Rabin public key encryption, we design our lightweight authentication scheme, which only involves two rounds of communication. Detailed security analysis demonstrates that our scheme is secure and privacy-preserving, and the extensive evaluation results also validate its efficiency. |
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